Sleepers On The Tracks

The area of cross-section of a railway track is 0.01 m^2 . The temperature variation is 10^@C . Coefficient of linear expansion of material of track is 10^(-5)//^@C . The energy stored per meter in the track is ______ J/m. (Young's modulus of material of track is 10^(11) Nm^(-2) )

(a) Whi are wide wooden sleepers kept below railway lines? (b) Whi does a balloon not collapse under atmospheric pressure?

A small block is shot into each of the four tracks as shown below. Each of the tracks rises to the same height. The speed with which the block enters the tracks is the same in all cases. At the highest point of the track, the normal reaction is maximum in :

A small block is shot into each of the four tracks as shown below. Each of the tracks rises to the same height. The speed with which the block enters the track is the same in all cases. At the highest point of the track, the normal reaction is maximum in

The inside perimeter of a running track is 340m. The length of each straight portion is 60m and the curved portions are semicircles. If the trackis 7m wide,find the area of the track.Also,find the outer perimeter of the track.

The inside perimeter of a running track (shown in figure) is 400m. The length of each of the straight portion is 90m and the ends are semi-circles. If the track is everywhere 14m wide, find the area of the track. Also find the length of the outer running track.

A toy train of mass M is moving on a circular track of radius R with constant speed v. The length of the train is half of the perimeter of the track. The linear momentum of the train will be

Assertion : Railways tracks are laid on small sized wooden sleepers. Reason : Small sized wooden sleepers are used so that rails exert more pressure on the railway track. Due to which rail does not leave the track